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def get_real_ip(request):
"""Returns the real user IP, even if behind a proxy."""
for key in ('HTTP_X_FORWARDED_FOR', 'REMOTE_ADDR'):
if key in request.META:
return request.META[key]
# No match -> Return a fictional IP to have the model fields not empty
return '192.168.255.255'
# AutoOneToOneField
# =================
# Initial implemenation details about AutoOneToOneField:
# http://softwaremaniacs.org/blog/2007/03/07/auto-one-to-one-field/
#
from django.db.models.fields.related_descriptors import ReverseOneToOneDescriptor
from django.db.models import OneToOneField
from django.db import models
class AutoReverseOneToOneDescriptor(ReverseOneToOneDescriptor):
"""The descriptor that handles the object creation for an
AutoOneToOneField."""
def __get__(self, instance, instance_type=None):
model = getattr(self.related, 'related_model', self.related.model)
try:
return (super(AutoReverseOneToOneDescriptor, self)
.__get__(instance, instance_type))
except model.DoesNotExist:
obj = model(**{self.related.field.name: instance})
obj.save()
# Don't return obj directly, otherwise it won't be added
# to Django's cache, and the first 2 calls to obj.relobj
# will return 2 different in-memory objects
return (super(AutoReverseOneToOneDescriptor, self)
.__get__(instance, instance_type))
class AutoOneToOneField(OneToOneField):
"""OneToOneField creates dependent object on first request from parent
object if dependent oject has not created yet."""
def contribute_to_related_class(self, cls, related):
setattr(cls, related.get_accessor_name(),
AutoReverseOneToOneDescriptor(related))
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